Improved door-threshold



UNITED STATES PATENT rrrcn.

CHARLES LORING, 0F SOUTH BRAINTREE, MASSACHUSETTS.

lWlPRVD R=THRESHLL Specication forming part of Letters Patent No.51,066, dated November 21, 1865.

To all whom it may concern:

Be it known that I, CHARLES LORING, of South Braintree, in the county ofNorfolk and State of Massachusetts, have invented an Improved Water-StoprIhre'shold and I do hereby declare that the following, taken inconnection with the drawings which accompany and form part oi' thisspecification, is a description of my invention sufficient to enablethose skilled in the art to practice it.

rIhe purpose of this invention is to prevent the beating or iowing ofrain and melted snow Within or past the thresholds of outside doors tohouses. lo attain this object a threshold has sometimes been made with agroove or channel sunk into the upper surface of the inner part thereof,and extending around such surface nearits edge, to and by the ends, tothe outer edge of the threshold, the channel deepening from opposite thecenter of the door to its opposite ends. This construction isolojectionable, because it leaves a free passage upon the surface of thethreshold for the ingress of air, and to remedy this defect I terminatethe groove before it reaches the outer edge, and provide anoutletchannel at or near the center of the groove, and it is thisirnproved construction which constitutes my in vention.

The drawings representa threshold embodying my invention, Figure lshowing a crosssection of the same as applied to a doorframe, and Fig. 2a plan of it.

The threshold a, which is generally made of cast-iron, inclines outwardinthe usual manner from its highest surface, over Which the door b ishung, and also has an inclination in- Ward, terminating in a groove orchannel, c.

The deepest part of this groove is at the center of the threshold, andfrom this point itinclines upward along the edge and around the ends,and runs out or terminates in the upper surfaces of the end pieces, d,leaving` the outer part of said surfaces Hush with the sides, so as tomake a Water-tight joint in connection with the door-frame, past whichneither rain nor wind can beat.

From the center of the groove a channel, e, leads down through or underthe threshold, as seen in Fig. l, and by dotted lines in Fig. 2. Thischannel serves for the escape of all water which may beat over thethreshold and run into the groove c.

In the other construction referred to the distance from the highestpoint in the watergroove at the center to the opposite ends is so greatthat it is difficult to give sulicient pitch to the groove to run thewater out, as the highest point in the groove is necessarily at the footof the inclination, but by my construction the highest points in thechannel are nearly level with the top surface of the threshold, whilefrom the center or lowest point such inclination can be readily given tothe channel e as to canse the water to run freely through it..

I claim- A Water-stop threshold in which the water groove or channelrunning around thetop-surface, near the inner edge of the threshold, hasan inclination from each end toward and so as to conduct the water intoa conduit leading from the center of the groove beneath the thresholdand to the front side thereof, substantially as set forth.

In Witness whereof I have hereunto set my hand.

CHARLES LORING. Witnesses:

J. B. CROSBY, F. GoULD.

